CN103889487B

CN103889487B - Port cannula for puncturing port catheters

Info

Publication number: CN103889487B
Application number: CN201380003571.4A
Authority: CN
Inventors: M·帕皮奥里克
Original assignee: Fresenius Kabi Deutschland GmbH
Current assignee: Fresenius Kabi Deutschland GmbH
Priority date: 2012-01-09
Filing date: 2013-01-09
Publication date: 2017-04-12
Anticipated expiration: 2033-01-09
Also published as: AU2013208998B2; EP2802372A1; CN103889487A; WO2013104642A1; US9149603B2; EP2802372B1; US20130226103A1; AU2013208998A1; ES2616754T3

Abstract

The present invention relates to a port cannula (1) for puncturing implantable and implanted port catheters. The cannula consists at least of a cannula tube (2) having a bevel, which is composed at least of a base bevel (11) that is inclined in relation to a central axis of the cannula tube at a base bevel angle, and two facet bevels (12) that extend at an angle to one another, and further consists of a cannula tip (13), which is formed by the bevel and is directed in the direction of the central axis of the cannula tube via a first bend, the base bevel angle (beta) ranging from beta = 13 degrees to 22 degrees and the angle (y) between the two facet bevels ranging from y = 90 degrees to 120 degrees. The base bevel and the facet bevel are adjusted to one another such that bending of the cannula is at least reduced and the patient's pain is kept within an acceptable range during puncturing.

Description

For puncturing the transfusion port trocar of transfusion port conduit

Technical field

The present invention relates to a kind of for puncturing transfusion port conduit (Portkatheter) that is implantable or being implanted into The transfusion port trocar (Portkanuele).

Background technology

The known trocar (or abbreviation puncture needle) for puncturing or being pierced into has in an end section of the trocar Have that inclined degree is more or less, wedge shape means of abrasion.Here, the rear portion seamed edge composition of the means of abrasion of wedge shape is sharp Cutting edge.Such cutting edge causes ingredient to be washed out from the material that need to be pierced through when puncturing.This is for example in tissue penetration When due to causing damage to be undesirable.In addition, when such trocar is used to puncture implantable transfusion port conduit, punching Fall effect and be proved to be very undesirable.Such transfusion port conduit at least includes under normal circumstances the capsule of implantation, the capsule With the cavity for extraction and/or injecting fluid such as blood, blood constituent or medicine.The capsule is connected with conduit, the conduit Lead to container or other active positions.The wall towards patient skin of the capsule of implantation is made up of the elastomer film that can be punctured, should Elastomer film sleeve pin is pierced through through skin.Sleeve pipe is needled into the film of transfusion port conduit and causes not tight in the following way Property, i.e. the rear portion seamed edge of means of abrasion washes out elastomeric material from film.Thus produce by the reset force of membrane material no longer The hole of energy seal itself.This causes implanted capsule to have leakage property after being pierced into several times.In addition, be washed out Elastomer particles may be washed in patient's body or by catheter blockage.

A kind of transfusion port trocar is described in the B1 of European patent EP 0 495 214, by the transfusion port trocar Can efficiently reduce and wash out phenomenon.The content of this document is comprehensively introduced in present patent application by quoting.There The solution of the trocar of introduction is：The cutting edge sleeve needle point being made up of rear portion seamed edge is substantially covered and thus no longer Can cutting.This is achieved basically by following manner, i.e. trocar tube is towards piercing part lateral bending and is entering one Be configured to during step hook-type and with the lumen orifice being tangentially ground in the concave shape of the pipe of hook-type extension (Lumenoeffnung), the lumen orifice constitutes behind determined by the molding of pipe, significantly inward-pointing cutting edge on seamed edge. The transfusion port trocar introduced in EP 0495214B1 is substantially met to transfusion port trocar requirement.

The content of the invention

According to foregoing background it is an object of the present invention to provide a kind of for puncturing the trocar of transfusion port conduit, wherein covering The puncture behavior of pipe pin should be further improved.

This purpose has passed through the trocar for puncturing implantable transfusion port and has been achieved, and the trocar is at least wrapped Include：Trocar tube with means of abrasion, the means of abrasion is at least by one with the facing sleeve needle tubing of grinding substrate angle The inclined grinding substrate of axis and two ground flat compositions for being arranged with angle relative to each other；Be made up of the means of abrasion Trocar tip, the trocar tip points to the direction of the axis of trocar tube via the first turning part, it is characterised in that：Grind Mill substrate angle in the scope of β=13 ° to 22 °, and the angle (γ) between two ground flats in γ=90 ° to 120 ° In scope.The beneficial embodiment of the trocar of the invention is indicated below.

The present inventor have recognized that：Leakage in transfusion port or transfusion port conduit film can not possibly be only by the trocar Membrane material is washed out what is caused during insertion.More specifically the trocar is likely to tear up membrane material with oneself when extracted.Especially This is caused by following situation, i.e. trocar tip may be touched on transfusion port bottom and be bent over after film is penetrated.Therefore Fishhook or hook are constituted on trocar tip, it can be so-called " scraping " from film by material in extraction.Particularly work as Such as trocar overexert ground and/or with mistake angle insertion transfusion port conduit when, incorrect due to the trocar makes With and promote the formation of this hook.In this case sharp tip is proved to be unfavorable, because such tip tool There is relatively low stability and can be easier to be deformed into hook.On the other hand, sharp tip proves beneficial, because so Tip insertion when effort it is relatively low.Required piercing power is less, and the pain punctured for patient is weaker.

In general, present invention setting：Make the trocar means of abrasion, particularly grinding substrate (Grundschliff) and Ground flat (Facettenschliff) shapes as follows or coordinated with each other, i.e. on the one hand avoids as far as possible or at least reduces On the other hand the formation of hook, and keep the pain of the patient when puncturing within the acceptable range.

The present invention is elaborated by being used to puncture the trocar of implantable transfusion port.The trocar or transfusion port The trocar at least includes：

Trocar tube with means of abrasion, the means of abrasion is at least by one grinding substrate angle (β) facing sleeve The inclined grinding substrate in axis of needle tubing and two ground flat compositions for being arranged with angle (γ) relative to each other；With by described The trocar tip that means of abrasion is formed, the trocar tip points to the direction of the axis of trocar tube via the first turning part, It is characterized in that：

Grinding substrate angle (β) in the scope of β=13 ° to 22 °, preferably in the scope of β=14 ° to 19 °, particularly preferably In the scope of β=15 ° to 17 °；And

Angle (γ) between two ground flats (12) is in the scope of γ=90 ° to 120 °, preferably in γ=100 ° Into 115 ° of scopes, particularly preferably in the scope of γ=105 ° to 110 °.

Grinding substrate is coordinated with each other consistent as follows with ground flat, i.e. when puncturing, and on the one hand at least reduces the trocar Bending and thus at least reduce the formation of trocar hook, on the other hand and the pain of patient is maintained at into acceptable In the range of.

In this case, trocar tip can also exceed the axis extension of trocar tube.The axis of trocar tube The unbent or straight section of the trocar is referred to all the time as reference value.Trocar tip not only by the trocar most Anterior point or piercing point is constituted.More precisely, trocar tip is made up of the region of means of abrasion, trouble is being pierced through in the region Real cutting process can be realized during the film of the skin of person and transfusion port.Especially, trocar tip by the trocar following area Domain is constituted, and ground flat is arranged on the area.Alternately, the trocar can at least constitute as follows：With means of abrasion Trocar tube, the means of abrasion is at least by an inclined grinding in axis to grind substrate angle (β) facing sleeve needle tubing Substrate and two ground flat compositions for being arranged with angle (γ) relative to each other；With the trocar being made up of the means of abrasion Point, the trocar tip points to the direction of the axis of trocar tube via the first turning part, wherein, grinding substrate angle (β) is in β In=13 ° to 22 ° of scope, preferably in the scope of β=14 ° to 19 °, particularly preferably in the scope of β=15 ° to 17 °, And/or the angle (γ) between two ground flats (12) in the scope of γ=90 ° to 120 °, preferably in γ=100 ° extremely In 115 ° of scope, particularly preferably in the scope of γ=105 ° to 110 °.

In the first embodiment of the present invention, the abrasive areas that there is substrate length to be a are ground.In two ground flats At least one ground flat there is length c of c ＜ 1/3a.It is preferred that two ground flats all length c with c ＜ 1/3a.It is logical Cross this mode and also further reduce and wash out phenomenon.

In trocar tube leading flank along the top view of trocar axis, the inner chamber of trocar tube at least in part by Trocar tip is covered.It is preferred that here, the trailing edge being made up of grinding substrate at least in part, particularly fully sleeve needle point Cover.Can also further reduce in this way and wash out phenomenon.In a preferred embodiment, the thorn of trocar tip Enter region or forefront region be located at 0.5mm on the axis of trocar tube and under 0.2mm scope g in, preferably on 0.2mm is with in the scope of 0.1mm.Preferably, trocar tip is located in the region on the axis of trocar tube.

In another embodiment of the invention, the first turning part of trocar tip is by preferably unique first bending half Footpath (r) is constituted.First bending radius is particularly in the scope of r=5mm to 10mm, preferably in the scope of 7mm to 9mm. First turning part of trocar tip has the first summit.It is preferred that this first summit and trocar tip be pierced into that region has away from From being e=3mm to 5mm, preferred 3.6mm to 4mm.

Especially for further reducing the possible area between two ground flats washed out phenomenon, grind substrate Section at least in part, it is preferably completely rounded.The seamed edge of specifically this section is rounded.In this case, by non- The method of grinding implements rounding.The possible example of the method for non-ground has bead injection, dry ice blasting and/or carbon dioxide Snow injection.It is preferred that all seamed edges all roundings in addition to ground flat of means of abrasion.

In a preferred embodiment, the trocar of the invention has at least one second turning parts.Sleeve pipe The end section of pin-- means of abrasion is arranged in the end section-- via the second turning part away from trocar tube Point to axis.Especially, the end section of the trocar-- means of abrasion be arranged in the end section-via second turn Turn of bilge and bend towards the direction in opposite direction with the first turning part.Preferably, the direction with the second turning part of the first turning part Angle relative to each other is 160 ° to 200 °, preferably 175 ° to 185 °, particularly preferably about 180 °.The name of turning part is come from by covering The leading flank of pipe pin is pierced into region sets out how to arrange the order of turning part.It is made up of the first turning part and the second turning part A type of spoon.Therefore such trocar is also called the trocar with curved spoon (Loeffelbiegung) for short. In this case, the structure of the trocar with spoon construction is proved to be beneficial, this is because trocar tip via first Turning part and the position of the axis of relative needle tubing orient less critical.

A kind of structure is as follows：Second turning part of end section has the second summit, second summit and trocar tip It is pierced into region to have apart from f=4mm to 10mm, preferred f=6mm to 10mm, particularly preferred f=6mm to 8mm.Preferably, sleeve pipe The end section of pin-- means of abrasion is arranged in the end section-- set with the axis of acute angle (α) facing sleeve needle tubing Put.Particularly the acute angle (α) is in the scope of α=1 ° to 10 °, preferably in the scope of α=4 ° to 7 °.

Another embodiment of the invention is characterised by：At least one section of the lateral surface of trocar tube has Jing Cross the surface of roughening.The operation of the trocar can be improved in this way.It is right to realize especially by this mode The reliable fixation of conveyer device (see below).With the section through the surface of roughening preferably and non-fully in the set Extend on the side face of pipe needle tubing.Especially, this section has roughness Rz, scope of the roughness at Rz=1 μm to 10 μm In, preferably in Rz=5 μm to 10 μm of scope.Preferably, the section with the surface through being roughened of lateral surface is arranged Be the distance that there is about 1mm with the dorsal part of trocar tube, and/or the lateral surface with the section tool through the surface of roughening There is the longitudinal extension of (along axis) about 2mm to 15mm, preferably from about 4.5 to 6.0mm.

As the biocompatible metal of materials'use of the trocar.The preferred material of the trocar is austenitic stainless steel. It is X5CrNi18-10 (material numbers for this example：1.4301).

In addition, there is a kind of transfusion port trocar system within the scope of this invention, the transfusion port trocar system includes A kind of embodiment of the aforesaid trocar of the invention.In addition, transfusion port trocar system includes being connected with the trocar , conveyer device for connecting transfer system flexible pipe.In this case, conveyer device be preferably provided at trocar tube with On the opposed section of the end section.In addition, transfusion port trocar system can have be connected with the conveyer device, use In the bearing that transfusion port trocar system is supported and is especially integrally fixed on patient skin.One example of the bearing is rubber Cream.In a kind of design, conveyer device is arranged on the section with the surface through being roughened of the lateral surface of trocar tube.

The transfusion port system (Portsystem) tested with the trocar of the invention is after about 150 times puncture It is proved to be still effective.Because transfusion port system is implantation, so medical personnel cannot see that the transfusion when puncturing Port system and can only touch.Therefore cannot ensure vertically to implement to puncture all the time at the center of film and/or all the time.This utilizes root It is also unwanted according to the trocar of the present invention.

Description of the drawings

With reference to the following examples elaboration in addition detailed to the present invention.For this referring to the drawings.It is identical in each accompanying drawing Reference refer to identical part.

Fig. 1 is illustrated that the schematic diagram for being implanted into subcutaneous transfusion port conduit；

Fig. 2 .a to c illustrate the top view (Fig. 2 .a) and non-dimensioning of the means of abrasion of the end section of the trocar (Fig. 2 .b) and indicate the side view of size (Fig. 2 .c)；

Fig. 3 .a to c illustrate the side view of the manufacturing process of the trocar of the invention；

Fig. 4 .a and b are illustrated that the trocar of the invention with trocar tube (Fig. 4 .a) and without trocar tube The photo of (Fig. 4 .b)；

Fig. 5 .a and b illustrate schematic diagram (Fig. 5 .a) and photo (figure of the trocar of the invention in order to be compared 5.a)；

Fig. 6 .a and b are illustrated that trocar system does not have bearing (Fig. 6 .a) and has showing for backed photo (Fig. 6 .a) It is intended to.

Specific embodiment

Fig. 1 is illustrated that the transfusion port conduit 30 of implantation.The implanted skin of transfusion port conduit 30 41 times and by solid Determine part 35 and be connected with anti-slip with surrounding tissue 40.Transfusion port conduit 30 is at least by housing 31, elastomer film 32 (such as by silicon Ketone is made) and the conduit 34 that is connected on housing 31 by union joint 33 constitute.Conduit 34 constitutes transfusion port 30 and surrounding group Knit the connection of 41, such as vein.In order to for example need the medicine of intravenous administration to patient's conveying, film 32 is by the trocar 1 or defeated The liquid port trocar 1 is pierced through skin 41.The trocar 1 is formed in infusion chamber of the construction in housing 31 and does not show into accompanying drawing Connection between the infusion bag for going out.Transfusion port conduit 30 can have the permission Implantation Time until 5 years.Transfusion port conduit 30 can Correspondingly repeatedly to be punctured by the transfusion port trocar 1.Transfusion port film (Portmembran) 32 will not be because of the puncture of the trocar 1 And it is substantially impaired.In order to ensure the lasting operation of transfusion port conduit 30, the special transfusion port trocar 1 can only be used.Root The requirement to this special trocar is fundamentally met according to the trocar 1 of the present invention.

Fig. 2 .a to c illustrate the top view (Fig. 2 .a) and non-scale of the means of abrasion 10 of the end section 4 of the trocar 1 Very little side view (Fig. 2 .b) and indicate the side view (Fig. 2 .c) of size.Fig. 2 .a are illustrated that bowing for the upside of means of abrasion 10 View.The trailing edge 14 produced by grinding substrate 11 can be seen.At least obvious sleeve in upper inner region of the trailing edge 14 Needle point 13 is covered, to avoid being cut away by the trailing edge 14 is caused as far as possible.The forefront region 13a of trocar tip 13 constitutes set The piercing region 13a of pipe pin 1.Implemented by two ground flats 12 through skin 41 and the real cutting through film 32. It is the rounded region 15 for grinding substrate 11 after two ground flats 12.It is preferred that means of abrasion 10 except ground flat 12 All seamed edges in addition are rounded.These ground flats are not rounded, are because that these ground flats implement cutting process.It is pierced into Region 14 is in this view on the axis M of the trocar 1.

In addition, Fig. 2 .b and 2.c illustrate the part of the trocar 1 with the side view shown in sectional elevation.For the reason for description These accompanying drawings are reprinted from EP 0495214B1.But the trocar 1 illustrated in present patent application has different designs.

Fig. 2 .b give first each feature of the trocar 1.End section 4 with means of abrasion 10 is via second turn The axis M inclinations or bending of turn of bilge 5 and facing sleeve needle tubing 2 or the trocar tube 2.Trocar tip 13 is over or through One turning part 3 and point to or bend towards straight trocar tube 2 axis M direction.The piercing region 13a of trocar tip 13 exists This is on the axis M of unbending trocar tube 2.The piercing region 13a of trocar tip 13 or as such part Trocar tip 13 can also extend in this plane partially above the axis M of pipe 2.

Provide each length specification of the trocar 1 in Fig. 2 .c now.The trocar has diameter d.Grinding substrate 11 is with folder Angle beta is characterized (for this reference picture 3.a).Angle β is unrelated with the diameter d of the trocar 1.For 19G pins (diameter d=1.1mm) Speech, grinding length a is that a=3.2mm to 4.4mm, preferably a=3.6mm to 4.0mm are proved to be beneficial.For 20G pins For (diameter d=0.9mm), grinding length a is a=2.4mm to 3.6mm, be preferably a=2.7mm to 3.1mm is proved to be to have Benefit.For 22G pins (diameter d=0.7mm), grinding length a be a=1.4mm to 3.0mm or to less than 3.0mm, preferably It is proved to be beneficial for a=1.8mm to 2.4mm.Angle α describes the angle of the second turning part 5 of end section 4.The Indicated by the arrowhead of reference 5 in the region that the summit (the second summit) of two turning parts 5 is located.End section 4 has length f.Length f describes the distance between forward terminal 13a and the second summit.Radius of curvature r describes trocar tip 13 First turning part 3.Indicated by the arrowhead of reference 3 in the region that the summit (the first summit) of the first turning part 3 is located.Sleeve pipe The section being bent over of needle point 13 has length e.Length e describes the distance between forward terminal 13a and the first summit.It is long Degree c describes the length of ground flat 12.Especially, c=0.5mm to 1.5mm, preferably 0.8mm to 1.2mm.Length b is retouched What is stated is the distance between seamed edge outside the rear portion of the second summit 5 and grinding substrate 11.Piercing region 13a is described apart from g to enclose Around the position of related features (3.c referring to the drawings) of the axis M of trocar tube.The length of the trocar 1 and the height of transfusion port 30 and this Depth (Positionstiefe) of the transfusion port 30 in tissue 40 is relevant.Length L that the trocar can have is L= 3cm to 6cm.

In order to illustrate the manufacture to the trocar of the invention 1, Fig. 3 .a to 3.c illustrate each processing step.First Prepare the trocar tube 2 in straight state.Means of abrasion 10 should be arranged in end section 4.In this means of abrasion 10 by grinding Mill substrate 11 and two ground flats 12 are constituted.For this, grinding substrate is set in the first step in the case where angle β is constituted 11.Two ground flats 12 (Fig. 3 .a) are then set in the case where angle γ is constituted.It is preferred that before means of abrasion 10 is arranged Make the rough surface in section 6.

In the next step, the second turning part 5 is set first.The second turning part 5 was prepared before the first turning part 3. Because the name of turning part 3 and 5 be not come from manufacture their time sequencing, but come from by the trocar 1 leading flank or Person piercing region 13a sets out and arranges the order of turning part 3 and 5.End section 4 bends an angle α via the second turning part 5 (Fig. 3 .b).End section 4 is bent away from the axis M of trocar tube 2.

In further step, the first turning part 3 is set now.For the side that this trocar tip 13 is bent toward axis M To.Trocar tip 13 is prepared on its leading flank by piercing region 13a.Turned to the direction of axis M by making trocar tip 13 Curved or bending, the trailing edge 14 is now significantly covered.In order to further reduce washing out effect (Ausstanzeffekt), including The section 15 of the trailing edge 14 is also rounded.

In order to illustrate the construction of the trocar 1 again, Fig. 4 .a and 4.b illustrate the photo of the trocar of the invention 1.One Aspect is it will be clear that the second turning part 5, by second turning part, the end section 4 of the trocar 1 is bent away from trocar tube 2 axis M.On the other hand it can also be seen that the first turning part 3, by first turning part, needle point 13 bends towards the trocar again The direction of the axis M of pipe 2, so as to the inner chamber 2a of cover sleeve needle tubing 2.

Last Fig. 5 .a and 5.b illustrate showing for the trocar of the invention 1 and its end section 4 in order to be compared It is intended to (Fig. 5 .a) and photo (Fig. 5 .b).It will be clear that the ground flat 12 for shortening, the ground flat 12 is larger The abrasive structure being preferably placed in short and/or middle section of angle γ and grinding substrate 11 (Schliffausfuehrung).By the trocar of the invention, particularly the trocar 1 is being inserted into into transfusion port conduit When in 30 and significantly reduce membrane material when the trocar 1 is extracted from transfusion port conduit 30 to be washed out.

Finally, Fig. 6 .a and 6.b are illustrated that without bearing (Fig. 6 .a) and have the transfusion port trocar of bearing 22 (Fig. 6 .a) The schematic diagram of system 20.Conveyer device 21 is the fittings body for making the trocar 1 be connected with the flexible pipe 23 of such as transfer system, its Lead to the unshowned, infusion bag containing the bioactive substance that need to be administered.For this Fig. 6 .b be illustrated that it is exemplary, have As the construction of the rubber plaster of bearing 22.In addition transfusion port trocar system 20 also has such as form for the anti-puncture of tubule 24 Device 24.The trocar 1 is arranged in the tubule.

The embodiment obviously illustrated for professional e.g. may be appreciated.The invention is not limited in These embodiments, and can be to be changed in diversified mode, without departing from the essence of the present invention.Each embodiment Feature and the feature enumerated in the overview section of description both can be separated from each other can also combination with one another.

Reference numerals list

1 trocar or the transfusion port trocar or pin

2 trocar tubes

The inner chamber of 2a trocar tubes

3 first turning parts or bending section

The end section of 4 trocars

5 second turning parts or bending section

The section with the surface through being roughened of 6 trocar tubes

10 means of abrasion

11 grinding substrates

12 ground flats

13 trocar tips

The front area of 13a trocar tips is pierced into region or is pierced into point

The trailing edge of 14 grinding substrates

The region between ground flat of 15 grinding substrates

20 transfusion port trocar systems

21 conveyer devices or fittings body

22 bearings or rubber plaster

23 flexible pipes

30 transfusion ports or transfusion port system or transfusion port conduit

31 transfusion port housings or housing

32 transfusion port films or film

33 adapter pieces for being used for conduit

34 conduits

35 fixtures for being used for transfusion port

40 tissues

41 skins

M axis

A abrasive areas or grinding substrate length

B grinds the distance between second summit of substrate beginning and the second turning part

The length of c ground flats

The external diameter of the d trocars

The piercing point of the e trocars is the distance between with the first summit of the first turning part

The length of f end sections or the trocar piercing point and the second summit of the second turning part it Between distance (f=a+b)

G is pierced into the distance in region to axis

R bending radius

The inclination angle of the turning parts of α second

β grinding substrates angle

Angle between γ ground flats

M axis

Claims

1. it is used to puncture the trocar (1) of implantable transfusion port (30), the trocar at least includes：

Trocar tube (2) with means of abrasion (10), at least by one, to grind, substrate angle (β) is relative to be covered the means of abrasion The inclined grinding substrate (11) in axis (M) of pipe needle tubing (2) and two ground flats for being arranged with angle (γ) relative to each other (12) constitute；With the trocar tip (13) being made up of the means of abrasion (10), the trocar tip is via the first turning part (3) Point to the direction of the axis (M) of trocar tube (2), it is characterised in that：

Grinding substrate angle (β) is in the scope of β=13 ° to 22 °, and the angle (γ) between two ground flats (12) is in γ In=90 ° to 120 ° of scope, wherein, first turning part (3) of trocar tip (13) is by unique first bending radius (r) structure Into.

2. the trocar (1) as claimed in claim 1, it is characterised in that：Grinding substrate (11) is with the milling zone that length is a Domain, and at least one of two ground flats (12) ground flat has length c of c ＜ 1/3a.

3. the trocar (1) as claimed in claim 1 or 2, it is characterised in that：The inner chamber (2a) of trocar tube (2) is at least partly Ground sleeve needle point (13) is covered.

4. the trocar (1) as claimed in claim 1 or 2, it is characterised in that：The trailing edge (14) being made up of grinding substrate (11) At least in part sleeve needle point (13) is covered.

5. the trocar (1) as claimed in claim 1 or 2, it is characterised in that：Piercing region (13a) position of trocar tip (13) On the axis (M) of trocar tube (2) 0.5mm and under 0.2mm scope g in.

6. the trocar (1) as claimed in claim 5, it is characterised in that：The piercing region (13a) of trocar tip (13) is located at set On the axis (M) of pipe needle tubing (2) 0.2mm and under 0.1mm scope g in.

7. the trocar (1) as claimed in claim 1 or 2, it is characterised in that：First bending radius is in r=5mm to 10mm Scope in.

8. the trocar (1) as claimed in claim 7, it is characterised in that：Model of first bending radius in r=7mm to 9mm In enclosing.

9. the trocar (1) as claimed in claim 1 or 2, it is characterised in that：First turning part (3) tool of trocar tip (13) There is the first summit, first summit has apart from e=3mm to 5mm with the piercing region (13a) of trocar tip (13).

10. the trocar (1) as claimed in claim 9, it is characterised in that：First summit and the piercing of trocar tip (13) Region (13a) has apart from e=3.6mm to 4mm.

11. trocars (1) as claimed in claim 1 or 2, it is characterised in that：Grinding positioned at two for grinding substrate (11) is put down Section (15) between face (12) is rounded at least in part.

12. trocars (1) as claimed in claim 11, it is characterised in that：Grinding substrate (11) positioned at two ground flats (12) section (15) between is completely rounded.

13. trocars (1) as claimed in claim 1 or 2, it is characterised in that：The end section (4) of the trocar (1)-- grind Mill part (10) be arranged in the end section-- via the second turning part (5) away from the axis (M) of trocar tube (2) Point to.

14. trocars (1) as claimed in claim 13, it is characterised in that：The end section (4) of the trocar (1)-- grinding Partly (10) be arranged in the end section-- bend towards the direction phase with the first turning part (3) via the second turning part (5) Anti- direction.

15. trocars (1) as claimed in claim 13, it is characterised in that：Second turning part (5) of the end section (4) With the second summit, second summit has apart from f=4mm to 10mm with the piercing region (13a) of trocar tip (13).

16. trocars (1) as claimed in claim 14, it is characterised in that：Second turning part (5) of the end section (4) With the second summit, second summit has apart from f=4mm to 10mm with the piercing region (13a) of trocar tip (13).

17. trocars (1) as described in claim 15 or 16, it is characterised in that：Second summit and trocar tip (13) Piercing region (13a) have apart from f=6mm to 10mm.

18. trocars (1) as claimed in claim 17, it is characterised in that：Second summit and the thorn of trocar tip (13) Enter region (13a) to have apart from f=6mm to 8mm.

19. trocars (1) as claimed in claim 1 or 2, it is characterised in that：The end section (4) of the trocar (1)-- grind Mill part (10) is arranged in the end section-- arranged with the axis (M) of acute angle (α) facing sleeve needle tubing (2).

20. trocars (1) as claimed in claim 19, it is characterised in that：Scope of the acute angle (α) α=1 ° to 10 ° In.

21. trocars (1) as claimed in claim 20, it is characterised in that：The acute angle (α) is in the scope of α=4 ° to 7 °.

22. trocars (1) as claimed in claim 1 or 2, it is characterised in that：At least one of the lateral surface of trocar tube (2) Section (6) is with through the surface of roughening.

23. trocars (1) as claimed in claim 22, it is characterised in that：The section and non-fully in described sleeve pipe needle tubing (2) extend on side face.

24. trocars (1) as claimed in claim 22, it is characterised in that：The section has roughness Rz, and the roughness exists In Rz=1 μm to 10 μm of scope.

25. trocars (1) as claimed in claim 24, it is characterised in that：Scope of the roughness at Rz=5 μm to 10 μm In.

26. transfusion port trocar systems (20), it includes：The trocar (1) as described in any one of claim 1 to 25；With The conveyer device (21) for being connected transfer system flexible pipe (23) being connected with the trocar (1), the conveyer device is arranged on set On the section opposed with end section (4) of pipe needle tubing (2).

27. transfusion port trocar systems (20) as claimed in claim 26, it is characterised in that：The transfusion port trocar system bag Include being connected with the conveyer device (21) and for transfusion port trocar system (20) to be bearing in the skin (41) of patient On bearing (22).

The 28. transfusion port trocar systems (20) as described in claim 26 or 27, it is characterised in that：Conveyer device (21) is arranged On the section (6) with the surface through being roughened of trocar tube (2) lateral surface.